Multicylinder pump



` 1,697,852 w. L. coURsEN,

lMULTIQYLINDER .PUMP

. o riginal Filed JarLll, 1927- Patented Jan. 8, x

UNl-TEDsTATEs PATENT* WALTER I.. coUnsEN, on yNEW nocnnLLnNnw Yonx, AssIGiron To Tunrzn narr- -FICIAL SILK COMPANY OF AMERICA, A. CORPORATION DELAWARE.

MLULTICYLINDER PUMP.

' application mea 'January' 1 1, 1927, serial ne. 160,373. l"aeaewea :une 16, 192s.

My invention relates to lmulticylinder;

pumps -of the type in which a rotating cylindrical body has formed in it a series of cylnders in which pistons are caused to reciprocate as the body revolves by means of a cam operating on the end ofthe pistons. The object of my invention is to provide a pump of this eneral character in which the fluid uon whic the pump operates will'act as alu cant Vfor theznoving parts and in which the moving parts will be only exposed to the dif-- ferential of pressure existing between the inlet and outlet ports of the pump, my pump bein specially designed for use with Viscous iui s such as viscose-or nitrocellulose collodion and to serve as a regulator controlling the delivery of the Huid to the spinerettes through which'the fluid is forced to form filaments although it will be understood that' my improved pump can be. usefull applied to any work for which a pump isa apted. f'

The nature of my improvements will be best understood as described in connection with the drawings, which illustrate a pump embodying my said improvements and in which Figure 1 isa top View of thev pump on the section line 1-1 of Fig. 3.

Figure 2 4is a sectional elevation of the pump' taken as o n the section line 2 2 of Figure 3 is a transverse sectional elevation on the line 3 3 of Fig. 2.

Figure 4 a transverse sectional elevation on the line 4:-4 of Fig. 2 and Fi re 5 is a view illustrating a simple device or adjusting the cam which actuates the pistons.

'A indicates the pump casimgv which is formed with a cylindrical bore indicated at A1 intermediate the ends of which are formed the suction and delivery chambers B and B1 communicating respectively' with the end chambers of the casing sages G and C1, which for the best lubricating eects are made Ias open faced channels, as indicated in the drawmgs. D is an inlet port connecting through an extension d with the chamber formed at one end of the casing `and E is an\ outlet port communicating through an extension e with the chamber at the other end of the casing. F is a cap closing one end of the casing. and forming an end chamberindicated at F1. This cap is held in dervof the cam I and the shoes N1 vtact with the face of the wabble plate K.

through conduit pas-` place as shown, :by bolts G passing through 2, which are slotted as indicated atf oF'FIcE.

so as to permit ofsuch angular adjustment of' the cap on the casing as maybe desirable to properly adjust the cam tobe described. F

1s an externally threaded gland casing extendcap secured-to the opposite end of the casing and affording a chamber;J1 at said end of the casing. This cap as indicated has an externally threaded perforation J3 in which lits a screw J 8 carrying a ball pivot at its inner end, as indicated at J 4. K is\a wabble plate vcentrally pivoted on the pivot J 4. Lis a shaft passing through the stuiiing box in the cap F 4and secured to or forming a part of a rotating body L1 which fits in the cylindrical bore of the casing and has formedin it a series oflongitudinally extending cylinders indicated at L, said cylinders havin radially extending ports, as indicatedv at 1, which register with the suction and delivery chambers B and 'B1 asthe rotating body revolves. By prefere ence and as shown in the drawings, an extension of reduced d1ameter, as lndlcated at L2,

and presscommunicates with the end chamber of the casing opposite to that with which the cylinroper communicates.` M, M1 indicates a di erential piston workin inthe cylinders L2, Ls and having as shown all pivots m, lm., at its ends.A As shown, these ball pivots lit into cylindrical recesses in sliding shoes N and N1, the shoes N resting in contact with vthe face resting in con- In operation the Huid enters the end chamber F1 through the ports D, d, asses thence through the trough-like port4 in free contact with the rotating body L1 into the suction port Bv; thence throughthe ports L* the Huid is drawn into the cylinder L8 during the outstrolre of thepiston M1 Aand forced by thepistons during their instrokes through the'- ports L1 into the delivery chamber B1; thence 1 the fluid passes through the troughlike chamber C1 in contact with the rotatin body into the end chamber J -1 sand thence t rough the outlet portE, and it will be obvious that b my construction all moving 'parts in the -en chambers F1 and JJ1 are thoroughlylubricated by the fluid passing through them; that there isno end pressure on the rotating body L1 except the differential of pressure lbetween Vthat in the chambers F1 and J1; that where the dierential pistons are used as :illustrated the pressure on the ends of the pis ton parts M and M1 are only exposed to the differential between. the pressure of the two end chambers and that where the conduit passages C and C1 have open faces, as indicated, the entire surface of the rotating body L1 is constantly lubricated by the fluid flowing through the said passages.

The adjustable pivot J8, J1 enables me to set the wabble plate K in such relation to the cam I as to hold the ends of the pistons in constant operative-contact with said cam and this adjustable pivot also enables me when the pressure in the two chambers F1 and J1 is so regulated as to hold the pistons in operative contact with the wabble plate to regulate the stroke of the pistons by retracting the pivot so that the cam will only act on the pistons during a portion of the rotation of the body L1.

two end chambers. Another important feature of m invention consists in the construction by W ich the conduits connecting the end chambers with the suction and delivery ports of the casing are open faced channels so that the rotating body carrying the cylinders is lubricated from end to end by the fluid iowing through these passages. v It is .also important, though not vital, to use the dil'erential piston construction indicated so that the ends of the differential piston will extend into the opposite en d chambers of the casing. This is desirable as both ends of the pistons are constantly lubricated by thefluid in the end chambers and because it enables me to use as a means for holding the pistons in operative relationship to the cam I awabble plate or equivalent located in the opposite end chambers; it will be understood however that any of the well known equivalent means for holding the piston inoperative contact with the 'cam may be used. .y

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

Y l. A multicylinder pump comprising a cas-` ing with a cylindrical bore, chambers at each lnected one to'each of said chambers, diaend thereof, inlet and outlet ports connected one to each of said chambers, diametrically opposedsuction and delivery chambers lying between the ends of its cylindrical bore and conduit passages connecting the end 7U -chambers of the casing with such suction and y delivery chambers in combination with a rotatingcylindr-ical body fitting in the cylindrical bore of the casing so that contacting surfaces form a substantially fluid-tight joint, said body having a series of pump cylinders extending longitudinally into it, and ports leading outwardly therefrom and registering with the suction and delivery chambers ofthe casing, pistons working in the pump cylinder having ends which extend into an end chamber of the casing, a xed cam located in the end chamber bore into which the pistons extend for actuating the pump piston and means for holding the pistons in operative position with respect to said cam.

2. A multicylinder pump comprising a casing with a cylindrical bo-re, chambers at each end thereof, inlet and outlet ports conmetrically opposed suction and delivery chambers lying between the ends of its cylindrical bore and conduit passages connecting the end chambers of the casing with such suction and delivery chambers in combination with a rotating cylindrical body fitting in the cylindrical bore of the casing so that the contacting surfaces form a substantially fluidtight joint, said body havingaseries of pump cylinders extending lonofitudinally through said body, and ports leadmg outwardly therefrom and registering with the suction and delivery chambers of the casing, differential pistons working in the pump cylinder having ends which extend into the end chambers of the casing, a fixed cam located in one of the. end chambers for actuating the pump piston and means for holding the pistons in operative position with respect to said cam.

3. A pump having the constructive fea-l lio tures of claim 1 further characterized by having the conduit passages connecting the end chambers of the casing with the suction and delivery chambers formed as open faced chambers in the cylindrical bore of the casing l so that the fluid passing through them flows in contact with the cylindrical surface of the rotating cylindrical bod 4. A ump. having t e constructive features of claim 2 further characterized by hav- 120 ing as an operative means for holding the pis- Y tons in operative relation to the cam, a wabble plate centrally pivoted in the end chamber opposite to that in which the cam is located and contacting with the piston ends extending into its containing end chamber. l

5. A ump having the constructive features o claim 2 further characterized by having as an operative means vfor holding the pistons in operative relation to the cam, a

Wabble plate centrally pivoted in the end chamber opposite to that in which the cam is located and contacting with the piston ends extending into its containing end chamberl i and means for adjusting the pivot of said having the conduit passages connecting the l0 end chambers of the casing with thesuction and delivery chambers formed as open faced chambers in the cylindrical bore of the casing so that the fluid passing through them Hows in contact With the cylindrical surfaceof the 15 rotating cylindrical body'.

WALTER L. COURSEN. 

